Malicious PDF — malware analysis report

Static analysis result for SHA-256 d136e811b80fb903…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 06:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b88825b023978f14a596ce6affeb79cd SHA-1: d5df97ef6d8531134790250fd650795884aad4d0 SHA-256: d136e811b80fb903f90b49301563b6aa1dd2158d8f6e68e903dd843134621bb4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the same URL found in the heuristic. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. The primary malicious IOC is the ttraff.com redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=singular+affirmative+formal+command+spanish
    • http://files.setsunlimited.com/uploads/1/3/1/8/131856079/jizezepimol.pdf
    • http://sadute.panyabistro.com/uploads/1/3/0/8/130813420/4878048.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/sevemizazodi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4346/2037/files/calicatas_de_suelos_agricolas_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/99985414126.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/mowowepolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/mubenuteripiletede.pdf
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/steven_s_skiena_the_algorithm_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4858/files/59197399297.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/63512947451.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/93553584759.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/how_to_download_a_file_from_github.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623c.bin
82af80ee3e9e4dfd3fa175ac8744bfe3bab744228830f637bbd29cd4bfd3bb96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 5732 bytes
font_01_sfnt_off00007598.bin
965bb745cc20cff54098a1d4b325950dcc71dcf0857571e477b14a10d15e7c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7598 10060 bytes

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